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The American Forestry Congress

The Geological Society of America

Washington as a Convention City

The New Copyright Bill Now Before Congress

An Improved Cable Grip

An Improved Parallel Ruler

An Easily Operated Telegraph Instrument

The Ginseng

By Nicolas Pike

The Malleco Viaduct, Chilian State Railway, Collipulli, Chili

Interesting Optical Illusions

By Geo. M. Hopkins

The Sign Language of the American Indians

The Magnetic Magnifying Glass and the Box of Numbers

Scientific American Building Edition- January 10, 1890

To Inventors- January 10, 1890


  • Letters

    Correspondence- January 10, 1890

  • Recommended

    New Books and Publications- January 10, 1890

  • Departments

    Notes and Queries- January 10, 1890

  • Business and Personal- January 10, 1890

  • Recently Patented Inventions- January 10, 1890

  • Index of Inventions- January 10, 1890

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